This place near the Battle of Muraki landmark is called Iguiba. This is the area where Nobunaga's soldiers celebrated their big victory at the Battle of Muraki 1554. I was fortunate enough to visit Iguiba last fall with Mr. Okehazama (Wataru Kajino) and Yukio and Akitsugu Kajino. This was an important victory over the Imagawa since six years later would be the Battle of Okehazama.
I wrote a post on the complete description of the Battle of Muraki 1554 last year. http://otsuke.blogspot.com/2013/02/muraki.html
Tenka no tame!